cy62148e Cypress Semiconductor Corporation., cy62148e Datasheet - Page 6

• Manufacturer Part Number: cy62148e
• Description: 4-mbit 512k X 8 Static Ram
• Manufacturer: Cypress Semiconductor Corporation.

Switching Waveforms
Read Cycle No. 1 (Address Transition Controlled)
Read Cycle No. 2 (OE Controlled)
Write Cycle No. 1 (WE Controlled, OE HIGH During Write)
Notes:
Document #: 38-05442 Rev. *F
16. Device is continuously selected. OE, CE = V
17. WE is HIGH for read cycles.
18. Address valid before or similar to CE transition LOW.
19. Data IO is high impedance if OE = V
20. If CE goes HIGH simultaneously with WE HIGH, the output remains in high impedance state.
21. During this period, the IOs are in output state and input signals must not be applied.
DATA OUT
CURRENT
ADDRESS
DATA OUT
ADDRESS
ADDRESS
SUPPLY
DATA IO
V
CE
OE
CC
WE
CE
OE
NOTE 21
PREVIOUS DATA VALID
HIGH IMPEDANCE
t
PU
IH
t
LZCE
.
t
SA
t
HZOE
[17, 18]
t
t
IL
LZOE
ACE
.
t
OHA
50%
t
DOE
t
[16, 17]
AA
t
AW
t
t
SCE
RC
[19, 20]
t
WC
t
RC
RC
t
t
PWE
DATA VALID
SD
DATA VALID
DATA VALID
t
t
HZOE
HA
CY62148E MoBL
t
HD
t
HZCE
t
PD
50%
IMPEDANCE
Page 6 of 10
HIGH
I
I
CC
SB
®
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